Installing SSL Certificates on Google App Engine

Author:Esadax
Updated:Apr 15, 2025

To install the SSL certificate, follow these organized steps:

  1. Combine Certificate and Intermediate CA:

    • Open yourdomain.crt and locate the -----END CERTIFICATE----- tag.
    • Append the entire content of yourdomain.ca-bundle immediately after this tag within yourdomain.crt.
    • Ensure the structure is correct with each certificate separated by -----BEGIN CERTIFICATE----- and -----END CERTIFICATE-----.
  2. Prepare Private Key File:

    • Extract the private key from your domain's files, ensuring it starts with -----BEGIN RSA PRIVATE KEY----- and ends with -----END RSA PRIVATE KEY-----.
    • Save this as mykey.txt.
  3. Upload Files:

    • Use the provided interface to upload:
      • The combined certificate (yourdomain.crt).
      • The private key file (mykey.txt).
  4. Enable SSL:

    • Select the domain for which you're enabling SSL.
    • Upload the files as instructed.
    • Save your settings after enabling SSL.
  5. Verify Installation:

    • Use an online tool like SSL Checker to ensure the SSL installation was successful.